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This thesis considers the problem of creating and designing an architecture for a software project that will result in a system for treatment of depression on the Internet. One of the requirements for this project, named by Melencolia, is to create a system which can be extended in the future. From this requirement we have derived the concept of modularity. In order to create a modular architecture we have concluded that modularity is a quality characteristic of multiple quality attributes such as "maintainability" and "reusability".
We deploy Attribute-Driven Design (ADD) in this Melencolia project. By doing this, an architecture that is focused around modularity can be created. Since modularity is not a quality attribute, but rather a quality characteristic, we had to change the input to ADD from a quality attribute to a quality characteristic.
Furthermore, we derive and propose a new method for quality characteristic evaluation of software architectures.
Finally we apply our aforementioned method on the architecture of Melencolia and by doing this we get an indication on how well our proposed architecture satisfies modularity.